21031

Names of 21031

• Cardinal: 21031 can be written as Twenty-one thousand and thirty-one.

Scientific notation

• Scientific notation: 2.1031 × 10⁴

Factors of 21031

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21031

Divisors of 21031

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21031
• Sum of all divisors σ(n): 21032
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21031 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21030

Bases of 21031

• Binary: 101001000100111₂
• Hexadecimal: 0x5227
• Base-36: G87

Squares and roots of 21031

• 21031 squared (21031²) is 442302961
• 21031 cubed (21031³) is 9302073572791
• The square root of 21031 is 145.0206881793
• The cube root of 21031 is 27.6028107477

Scales and comparisons

• 21,031 seconds is equal to 5 hours, 50 minutes, 31 seconds.
• To count from 1 to 21,031 would take you about five hours.

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21031 cubic inches would be around 2.3 feet tall.

Recreational maths with 21031

• 21031 backwards is 13012
• The number of decimal digits it has is: 5
• The sum of 21031's digits is 7
• More coming soon!